In
Nuclear power stations, Moisture Separator
reheaters (MSR) dry and reheat steam exciting
the high pressure turbine before it enters
the medium and low pressure stages. VALTIMET
has developed a proprietary method of enhancing
the outer tube surface with integral fins,
to accelerate the heat transfer. Our finned
tubing promotes economical material use and
reduces the MSR's size and cost
Profile Projector
Assembly of MSR
To
meet the tolerance and quality demands of nuclear
plants, VALTIMET has designed a unique, totally
integrated production method for finning stainless
steel tubes, typically in ferritic alloy 439L,
under the patented name of Valfin®. Valfin
tubes can also be manufactured in austenitic
stainless steel or titanium. These tubes are
available with 19 or 27 fins per inch, in lengths
up to 46 meters, and are bent according to
customer requirements. Their crest diameter
equals the diameter of plain tubes so they
can be easily inserted through baffle plates
and plugged into tube sheets
You
can count on our proven reliability, in testing
and in use. VALTIMET's MSR production lines
are specially designed for welding ferritic
stainless steels. MSR tubes undergo ultrasonic
testing, and are then cold finned to yield
optimum quality. Finned tube samples are taken
at regular intervals and examined on profile
projectors (called optical comparitors) to
assure dimensional conformance. Afterwards,
the entire tube is heat treated, eddy current
inspected and bent to specifications. Millions
of meters of Valfin tubes are in service throughout
the world today
Welded
ferritic stainless steel tubes
are the VALTIMET solution to improved
high pressure feedwater heater
performance. We have mastered the
welding of high strength ferritic
alloys to provide thinner walled
tubing with superior corrosion
and erosion resistance, high thermal
conductivity, a coefficient of
expansion close to that of carbon
steel used in plant structures,
and excellent mechanical properties.
The result is a more economical
heater that is lighter weight,
simpler to manufacture and more
efficient.
Continuous
Weld Line
To
improve the characteristics of welded austenitic
stainless steel tubes, VALTIMET has developed
and patented a near-seamless technique for
LP heaters which is a cold working and heat
treatment technique called Rollsink Annealing®.
Immediately after welding, the tube is cold
worked, then induction heat treated in-line
and rapidly cooled, all under a protective
atmosphere. The resultant weld bead exhibits
recrystallization and homogeneous mechanical
and corrosion-resistant properties.
In-Line Heat Treatment
Heat Treatment by Electric
Resistance
U-Bending
Integrated into Production Process
For
more than two decades, VALTIMET has supplied welded
titanium, stainless steel and more recently
copper-nickel condenser tubes to power generating
stations worldwide. Through our long term relationships
with power station engineers and constructors,
equipment manufacturers and utilities, we have
gained unequalled expertise in manufacturing
tubing for nuclear and fossil fuel power plants.
Today, because of our advanced welding technologies,
extensive product selection, vast experience
and customer commitment, the power generation
industry recognizes VALTIMET as the world leader
in welded tubes.
For nuclear
power generating stations cooled by
uncontaminated water or cooling towers, VALTIMET
supplies titanium, austenitic and
ferritic stainless steel welded tubes. Utilities
worldwide have switched from copper alloys
to these materials to avoid propagation of
copper ions in the steam generators and to
allow greater circulation speed.
In saltwater
cooled power plants, VALTIMET pioneered
the manufacture and application of titanium
welded tubes for surface condensers.
Titanium's unique, naturally occuring oxide
film makes it impervious to chloride ion
attack. This corrosion immunity, in conjunction
with its relatively high thermal conductivity,
makes titanium the material choice for brackish
and seawater use. Titanium is also specified
without a corrosion allowance, resulting
in thinner tube walls that increase thermal
efficiency and flow rates.
Power Plant
For
more than two decades, VALTIMET has supplied welded
titanium, stainless steel and more recently
copper-nickel condenser tubes to power generating
stations worldwide. Through our long
term relationships with power station engineers
and constructors, equipment manufacturers and
utilities, we have gained unequalled expertise
in manufacturing tubing for nuclear and fossil
fuel power plants. Today, because of our advanced
welding technologies, extensive product selection,
vast experience and customer commitment, the
power generation industry recognizes VALTIMET
as the world leader in welded tubes
For nuclear
power generating stations cooled by
uncontaminated water or cooling towers, VALTIMET
supplies titanium, austenitic and
ferritic stainless steel welded tubes. Utilities
worldwide have switched from copper alloys
to these materials to avoid propagation of
copper ions in the steam generators and to
allow greater circulation speed
In saltwater
cooled power plants, VALTIMET pioneered
the manufacture and application of titanium
welded tubes for surface condensers.
Titanium's unique, naturally occuring oxide
film makes it impervious to chloride ion
attack. This corrosion immunity, in conjunction
with its relatively high thermal conductivity,
makes titanium the material choice for brackish
and seawater use. Titanium is also specified
without a corrosion allowance, resulting
in thinner tube walls that increase thermal
efficiency and flow rates
